Transfer of XML through a firewall is taking time

Hi,
I have following scenario:
Publisher BPEL --> || Firewall || Subscriber BPEL
Now the XML is being transferred over the firewall is around 9MB.
When these two BPEL processes are deployed on local intranet, the transfer of XML is too fast and Subscriber BPEL completes within seconds. But when above two BPEL are deployed over the internet with firewall in-between, XML transfer is taking time of about 15 Minutes.
Is there a solution to reduce the XML transfer time or some work-around to handle such issue?
Thanks,
Bhavnesh.

If it is a 9mb file this is quite large, I think this will come down to latency and bandwidwth. Test form your environment how long does it take to download a 9mb, then from the remote location. If this takes around 15 mins to perform then there is little you can do but get a better ISP.
I doubt the issue will be with the firewall.
cheers
James

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